fio2gnuplot: Keep original filename in temp. files

It was pretty hard to understand what trace file was linked to which fio
output file. This simple commit add a simpler header to inform the
debugger which fio outputfile got used.

diff --git a/tools/plot/fio2gnuplot.py b/tools/plot/fio2gnuplot.py
index ef32ee0b156dac047cef5ee0cd71fd60214b35fa..5e32045dde1bcc0440dd5d83f1bcb059838a1ee5 100755 (executable)
--- a/tools/plot/fio2gnuplot.py
+++ b/tools/plot/fio2gnuplot.py
@@ -91,7 +91,9 @@ def compute_temp_file(fio_data_file,disk_perf):
                files.append(open(file))
                pos = len(files) - 1
                tmp_filename = "gnuplot_temp_file.%d" % pos
-               temp_outfile.append(open(tmp_filename,'w'))
+               gnuplot_file=open(tmp_filename,'w')
+               temp_outfile.append(gnuplot_file)
+               gnuplot_file.write("#Temporary file based on file %s\n" % file)
                disk_perf.append([])
 
        shall_break = False